Speaker
Description
Circular muon colliders offer a promising route to multi-TeV center-of-mass energies with high luminosity. The baseline design for the high-energy complex includes a chain of pulsed synchrotrons covering energies from 63 GeV to 5 TeV. This chain combines normal and hybrid synchrotrons, using both fixed-field superconducting and pulsed normal-conducting magnets. The short muon lifetime (2.2 microseconds in the rest frame) constitutes a major challenge for the accelerator complex: attaining high luminosity requires a muon survival rate of up to 70 % throughout the acceleration chain, implying acceleration within a few milliseconds. Such rapid acceleration causes a mismatch between the beam energy in the arcs and the linearly ramped fields of the dipoles and quadrupoles. The corresponding field errors affect both the beam trajectory and optical functions. Preliminary tracking studies have been conducted to assess the emittance growth arising from these effects.
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